Rotary vane pump



Oct. 23, 1945. c.R. WASEIGE ROTARY vANE PUMP '2 sheets-sheet 1 Filed Dec. so, 1942 Oct. 23, 1945. Y C R, WASEIGE Y I 2,387,629

ROTARY VANE PUMP Filed Dec. zo, 1.942 2 sheets-sheet 2 \\i\a L( fn :fen for CHA/91.55 W'f/GE L sign used when weight, purity o: the

Patented 23, 1945 UNITED srlrrEs PATENT OFFICE 2,887,829 l no1-sar vANE Pour chum/namens' www, smasaenne, Loire, France; vested in the Alien Property Custodian Application December 3l, 1942, Serial No. 470,829

- In France November 12, 1941 Claims. ((21. 23o-157) My invention relates to rotary vane `pump or compressor for air or other gases of the kind having radial vanes mounted on a shaft co-axial to the casing of the pump. for convenience hereinafter termed barrel, and driven by a rotor arranged eccentrically to the barrel.

The main object of my invention is to improve this type of pump and more particularly the deair and safety of working have a, primary importance as is the case on aircraft.

It is known that in pumps of this kind, there have occurred jamming of the vanes in their guides and in the barrel, along with a heating of the eyes of thevanes when these pumps rotate at high speed. These undesirable results are caused by bending of the shaft of the vanes under the action of the centrifugal torce and from insuicient lubrication of vanes on their shaft, lubrication which cannot be increased without clfiarging the air with an objectionable quantity o oil. .y

Another object of my invention is to prevent the 'bending of the shaft or the vanes and to increase the rotational speed of the pump'.

A still further obiect of my invention-is to prevent the heating ofthe eyes of the vanes.

Other objects of ymy invention are brought out more fully in the description and claims. By way of non-limitative examples; various embodiments of a pump according to my invention have been,

schematically represented in drawings.Y l

In these drawings: Fig. 1 is a longitudinal section of a pum Fig. 2 a transversal section according to the line II-dI of Fis. l. 4 4

Figs. 3, 4 and 5 are similar views to Fig. l with modiiications.

In'the examples illustrated, the pump belongs to the type comprising radial vanes I, here three the accompanying ballbearingimounted'inanendplatelonthe end of the barrel 3 and on the other hand lin a -ball bearing amounted in a rotating member Ill itself supported by a roller bearing II tted into a transverse partition I2 which is mounted on the end of a casing part I3 fixed onthe other extremity of the barrel I.

The rotor 4 is also supported at its two ex. tremities by ball-bearings I4 and l5 respectively supported by the'end plate l and the casing 4 part Il.

The rotating member I0 serves asa driving member of rotor 4 by means of a gearing comprislng an intermediary shaft I1 carrying two gears I8 and It of different diameters, the smaller of which I8 meshes with a gear 20 formed on .the member I0 and the other I9 with av gear 2| formed on the rotorI 4. Therefore this gearing serves as a speed increasing means. The shaft Il is mounted in ball-bearings 22 and 23 respectively supported by casing part Il and partition I2'and extends on the other side of the latter where it is provided with a worm gear 25 which operates an oiling pump 26 having an inlet pipel 2l for oil under pressure and an outlet pipe 2l to the extremity of the hollow shaft 2 to provide for the lubrication oi' the eyes 29o! the vanes, by means of transverse holes 20 provided in this hollow shaft 2.' l. Y The rotating member I0 also serves as a easing fora torque limiting device Il of any suitable tvparor coupling member In to a driving shaft 'I2 concentric with member III andjournaled in A,a roller bearing I3 in a cover plate 34 ilxed to the end of casing Il about the partition I2.' It will be noticed that in this embodiment, the gears are enclosed in casing part I3 on one side of partition I2 whereas the torque limiting device 3| and in number, freely engaged on a shaft 2 coaxial with the barrel l having an air inlet 3 and an air outlet I" (Fig. 2). A hollow rotor 4 is eccentrlcally mounted in the barrel 3 (the shaft 2 being-arranged within the said rotor 4). Atthe periphery o 't the rotor 4 are formed sockets for avides 5 each of them being mounted for' free rotation upon itself in its socket around an axis parallel with those o! the `rotor 4 ,and of the barrel'l: Each guide i is provided with a diametral slot in which a vane I is slidably mounted with 'lisht friction. v

In the embodiment shown in Fig, 1,the shaft 2 through'the rotor and is supported, on

Ymechanism is obvious and the working of such'a the ailing pump are on the other side. inside the cover plate 3e. The latter has, for the mounting of the pump, a cheek 35 perpendicular to the rotation axis. The pump is operated by means of the shaft l2' which projects outside cover plate J4.

The operation or the'rotor 4 by the described pump is well-known.

The modication represented in Fig. 3 diners chiefly from the preceding one byqthe fact that the driving shaft 32a is eccentrically `arranged with reference to the barrel and operates the rotating member' loa through the medium or a single pair of gears 20a, 2Ia without an inter#l mediary shaft.

In the further modification shown in Fig. 4,

the shaft 2b is provided, at its end opposite the end adjacent the driving shaft 32, with coupling means 40 here formed by splines, for coupling another apparatus directly on the pump. The shaft 2b is rotated by a toothed wheel 4| fixed upon it and in gear with another wheel H2 fixed on lshaft I'lb. Preferably thel ratio of gearing 4l--42 differs very slightly from that of gearing I9-,-2I so that there is a slow relative rotation between this shaft I'lb and the eyes of the varies.

The embodiment shown in Fig. differs from the preceding one by the fact that the shaft 2c is driven directly by the shaft 32c and is provided for that purpose, with means 43, coupling it directly with this shaft 32c, formed for instance by splines. v

, What I claimis:

1. A rotary vane pump or compressor comprising a cylindrical barrel, a shaft co-axial with said barrel, radial vanes mounted on said shaft for free rotation about said shaft, a rotor eccentrically mounted in said barrel and engaging said vanes, a hollow rotatable member journaled in said barrel, a driving shaft co-axial with said `first-mentioned shaft, said member having'one end of each of said two shafts received therein, a driving connection between said driving shaft and said rotatable member and a driving connection between said rotatable member and said rotor.

2. A rotary vane rpump or compressor comprising a cylindrical barrel, a shaft journaled in said barrel, radial vanes mounted on said shaft for free rotation about said shaft, a' rotor eccentrically mounted in said barrel and engaging said vanes, a hollow rotatable member journaled in said barrel,l a driving shaft co-axial with said first-mentioned shaft, said member having one of said shaft end of each of saidy two shafts received therein, a driving connection between said driving shaft and said rotatable member, and a driving connection between said rotatable member and said rotor.

3. A rotary vane pump or compressor comprising a casing having a cylindrical barrel, a shaft co-axial with said barrel, radial vanes mounted on'said shaft for free rotation, a rotor engaging said vanes and eocentrically arranged within said barrel, a h'ollow rotating member carried by the casing and co-axial with the said shaft; the end being journaled in said rotating member, a driving connection/between said rotor and said rotating member, a driving shaft having oneend received in saidmember, and coupling means, interposed between and coupling` said driving shaft and said rotatable member.

4. A rotar'y vane pump or compressor as claimed in claim 3 in which said driving connection includes a speed increasing gear enclosed in said casing.

5. A rotary pump or compressor comprising a.A

casing havingv a cylindrical barrel, a shaft coaxial with said barrel, radial vanes mounted on said shaft for free rotation, a rotor eccentrically mounted in said barrel, a rotating member, coaxial with said shaft and carrying one end of same, driving gearing means between said rotor and said rotating member, an intermediate shaft forming part of said gearing, an oiling pump,

from said oil pump' oil passages being provided to the vanes for their lubrication, a driving connection between said intermediate shaft and said oiling pump and a drivingniember Vfor said rotating member.'

CHARLES RAYMOND WASEIGE. 

